Auxiliary positioning device of long cutter bar

Abstract

The utility model belongs to the technical field of cutters, and particularly relates to an auxiliary positioning device of a long cutter bar. The ball bearing comprises an outer ring, a plurality of ball holes are formed in the inner wall of the outer ring, the ball holes are used for containing balls, and the top edges of the balls protrude out of the circumferential face of the outer ring; the bushing ring is arranged in the outer ring, a plurality of ball grooves are formed in the circumferential surface of the bushing ring, the ball grooves correspond to the ball holes in position, and the ball grooves are also used for containing the balls; an inner hole of the cutter bar lantern ring is matched with the long cutter bar, and the cutter bar lantern ring is connected with the bushing ring; the outer ring, the bushing ring and the cutter bar lantern ring are concentric; and a circular outline formed by the top edges of the balls is matched with the deep hole. The device is used for solving the technical problems that in the prior art, a method for solving vibration of a long cutter bar in deep hole machining is large in operation difficulty, and production cost is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, and particularly relates to an auxiliary positioning device for a long tool shank. Background Art

[0002] Deep hole machining refers to the hole machining process where the hole depth to hole diameter ratio is ≥6. Deep hole machining has always been a pain point in metal cutting machining. One of the disadvantages of deep hole machining is that the tool shank has a small diameter and a long length, and it is easy to generate vibration, ripple, and taper during cutting, which affects the straightness and surface roughness of the deep hole.

[0003] To solve this disadvantage, the following methods are generally adopted in the prior art:

[0004] 1. Enhance the tool rigidity: Select a boring bar with a larger diameter, shorten the overhang of the tool shank, or use a carbide material and a damping tool shank with damping function.

[0005] 2. Strengthen the clamping force: Increase the clamping length and change the clamping structure to improve the clamping stability of the tool shank.

[0006] The above methods not only increase the operation difficulty but also significantly increase the production cost. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an auxiliary positioning device for a long tool shank, which is used to solve the technical problems that the methods for solving the vibration of the long tool shank in deep hole machining in the prior art have large operation difficulty and increase the production cost.

[0008] The technical solution for the utility model to solve the above technical problems is as follows: An auxiliary positioning device for a long tool shank, comprising:

[0009] An outer ring, wherein a plurality of ball holes are formed in the inner wall of the outer ring, the ball holes are used to accommodate balls, and the top edges of the balls protrude from the peripheral surface of the outer ring;

[0010] A lining ring, which is placed inside the outer ring, and a plurality of ball grooves are provided on the peripheral surface of the lining ring, the positions of the ball grooves correspond to those of the ball holes, and the ball grooves are also used to accommodate the balls;

[0011] A tool shank collar, the inner hole of the tool shank collar is adapted to the long tool shank, and the tool shank collar is connected to the lining ring;

[0012] The outer ring, the lining ring and the tool shank collar are concentric;

[0013] The circular profile formed by the top edges of the plurality of balls is adapted to the deep hole.

[0014] This application is sleeved on a long tool shank. When the long tool shank extends into a deep hole, the balls on the outer ring are tangent to the deep hole. The long tool shank is fixed at the center of the deep hole by using the outer ring, the lining ring and the tool shank collar, reducing the vibration of the long tool shank during cutting and ensuring the quality of deep hole machining.

[0015] Further: The lining ring is at least equally divided into four arc pieces.

[0016] The beneficial effect of this step: The lining ring is composed of four or more arc pieces, which are easier to assemble during installation.

[0017] Further: A retaining ring is provided at one end of the lining ring.

[0018] The beneficial effect of this step: The retaining ring plays a role in limiting the position of the lining ring, preventing the lining ring and the outer ring from being misaligned and affecting the rotation of the balls.

[0019] Further: The tool shank collar is of a split structure, including an upper ring block and a lower ring block, and the upper ring block and the lower ring block are connected by fasteners.

[0020] The beneficial effect of this step: The split structure can facilitate the assembly and disassembly of the tool shank collar.

[0021] Further: The contact surface between the upper ring block and the lower ring block is of a meshing type.

[0022] The beneficial effect of this step: It can ensure the alignment of the upper ring block and the lower ring block and improve the position accuracy.

[0023] Further: The inner hole is a round hole or a square hole.

[0024] The beneficial effect of this step: The long tool shank is a round rod or a square rod, and the inner hole is convenient for matching with the long tool shank.

[0025] Further: The tool shank collar and the lining ring are in interference fit, or the tool shank collar and the lining ring are connected by a bearing.

[0026] The beneficial effect of this step: Ensure the concentricity of the tool shank collar, the lining ring and the outer ring, and improve the position accuracy.

[0027] Further: A plurality of grease grooves are also provided on the inner wall of the outer ring, and the grease grooves communicate with a plurality of the ball holes.

[0028] The beneficial effect of this step: The grease grooves can accommodate the excess grease and make the balls roll more smoothly.

[0029] The beneficial effects of the present utility model are:

[0030] 1. In the process of deep hole machining with a long tool shank, this application ensures that the long tool shank is coaxial with the deep hole on the workpiece, can smoothly move and rotate relative to the deep hole, reduce the vibration of the long tool shank, and improve the machining quality of the deep hole;

[0031] 2. The structure of this application is simple, with low manufacturing difficulty, low cost, and is convenient and reliable to use;

[0032] 3. By changing the sizes of the outer ring and the lining ring, this application can also be applicable to deep holes of different specifications, with a wide range of applications. Brief Description of the Drawings

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 A perspective view of an auxiliary positioning device for a long tool shank provided by the present invention;

[0035] Figure 2 A structural schematic diagram of an auxiliary positioning device for a long tool shank provided by the present invention;

[0036] Figure 3 For Figure 2 A cross-sectional schematic diagram of part A-A in

[0037] Figure 4 An application schematic diagram of an auxiliary positioning device for a long tool shank provided by the present invention;

[0038] Figure 5 A perspective view of the outer ring in an auxiliary positioning device for a long tool shank provided by the present invention;

[0039] Figure 6 A perspective view of the lining ring arc piece in an auxiliary positioning device for a long tool shank provided by the present invention;

[0040] Figure 7 A perspective view of the tool shank collar in an auxiliary positioning device for a long tool shank provided by the present invention.

[0041] Reference Signs:

[0042] 1 - Outer Ring; 2 - Lining Ring; 3 - Ball; 4 - Tool Shank Collar; 5 - Bearing; 6 - Long Tool Shank; 7 - Workpiece;

[0043] 11 - Ball hole; 12 - Grease groove; 21 - Arc piece; 22 - Retaining ring; 23 - Ball groove; 41 - Upper ring block; 42 - Lower ring block; 43 - Inner hole. Detailed implementation mode

[0044] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present utility model more clearly, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0045] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0047] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present utility model, "a plurality" means more than two unless otherwise specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0050] Embodiment

[0051] As Figure 1 、 Figure 2 and Figure 3 shown, an auxiliary positioning device for a long tool shank provided by the present utility model includes:

[0052] An outer ring 1, wherein a plurality of ball holes 11 are formed in the inner wall of the outer ring 1, the ball holes 11 are used for accommodating balls 3, and the top edges of the balls 3 protrude from the circumferential surface of the outer ring 1;

[0053] A lining ring 2, which is placed inside the outer ring 1, and a plurality of ball grooves 23 are provided on the circumferential surface of the lining ring 2, the positions of the ball grooves 23 correspond to those of the ball holes 11, and the ball grooves 23 are also used for accommodating the balls 3;

[0054] A tool shank sleeve ring 4, the inner hole 43 of the tool shank sleeve ring 4 is adapted to the long tool shank 6, and the tool shank sleeve ring 4 is connected to the lining ring 2;

[0055] The outer ring 1, the lining ring 2 and the tool shank sleeve ring 4 are concentric;

[0056] The circular contour formed by the top edges of the plurality of balls 3 is adapted to the deep hole.

[0057] As Figure 4 shown, in this application, the tool shank sleeve ring 4 is sleeved on the long tool shank 6. When the long tool shank 6 extends into the deep hole of the workpiece 7, the balls 3 on the outer ring 1 are tangent to the deep hole, and this application abuts against the inner wall of the deep hole. It can not only use the balls 3 to achieve rolling friction and reduce the moving friction force, but also use the outer ring 1, the lining ring 2 and the tool shank sleeve ring 4 to fix the long tool shank 6 at the center of the deep hole, reduce the vibration of the long tool shank 6 during the cutting process, and ensure the quality of the deep hole machining.

[0058] As Figure 6 shown, the lining ring 2 is at least equally divided into four arc pieces 21.

[0059] The lining ring 2 is composed of four or more arc pieces 21, which are easier to splice during installation.

[0060] Based on the above technical solution, a retaining ring 22 is provided at one end of the lining ring 2.

[0061] The retaining ring 22 functions to position the lining ring 2, preventing misalignment between the lining ring 2 and the outer ring 1 and affecting the rotation of the ball 3.

[0062] As Figure 7 shown, the tool shank collar 4 has a split structure. The split structure is a symmetric connection structure on both sides, including an upper ring block 41 and a lower ring block 42. The upper ring block 41 and the lower ring block 42 are connected by fasteners. Specifically, a countersunk hole is provided on the upper ring block 41, and a threaded hole is provided at the position corresponding to the countersunk hole on the lower ring block 42. The upper ring block 41 and the lower ring block 42 are fixedly connected by countersunk head screws.

[0063] The split structure facilitates the assembly and disassembly of the tool shank collar 4.

[0064] Based on the above technical solution, the contact surfaces of the upper ring block 41 and the lower ring block 42 are meshing types, including various structures such as concave-convex type, straight tooth type, or pin type.

[0065] The meshing structure can ensure the alignment of the upper ring block and the lower ring block, improving the position accuracy.

[0066] Based on the above technical solution, the inner hole 43 is a round hole or a square hole.

[0067] The long tool shank 6 is a round rod or a square rod, and the inner hole 43 facilitates the matching use with the long tool shank 6.

[0068] Based on the above technical solution, the tool shank collar 4 and the lining ring 2 are in interference fit, or the tool shank collar 4 and the lining ring 2 are connected by a bearing 5.

[0069] Ensure that the tool shank collar 4, the lining ring 2, and the outer ring 1 are concentric, improving the position accuracy. In this embodiment, preferably, the tool shank collar 4 and the lining ring 2 are connected by a bearing 5. The bearing 5 allows the outer ring 1 to rotate relative to the tool shank collar 4, which is more suitable for machining a rotating workpiece 7.

[0070] Based on the above technical solution, a plurality of grease grooves 12 are further provided on the inner wall of the outer ring 1, and the grease grooves 12 communicate with a plurality of the ball holes 11.

[0071] To improve the rotation effect of the ball 3 and reduce the friction between the ball 3 and the outer ring 1 and the lining ring 2, it is necessary to apply grease to the ball 3 (grease has strong adhesion and a long lubrication time, and grease is preferably used instead of lubricating oil). Among them, the grease groove 12 can accommodate the excess grease, making the ball 3 roll more smoothly (avoiding sucking the ball 3).

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary positioning device for a long tool shank, characterized in that, Comprising: An outer ring, wherein a plurality of ball holes are formed in the inner wall of the outer ring, the ball holes are used for accommodating balls, and the top edges of the balls protrude from the peripheral surface of the outer ring; A lining ring, which is placed inside the outer ring, and a plurality of ball grooves are provided on the peripheral surface of the lining ring, the positions of the ball grooves correspond to those of the ball holes, and the ball grooves are also used for accommodating the balls; A tool shank collar, the inner hole of which is adapted to the long tool shank, and the tool shank collar is connected to the lining ring; The outer ring, the lining ring and the tool shank collar are concentric; The circular contour formed by the top edges of the plurality of balls is adapted to the deep hole.

2. The auxiliary positioning device for the long tool shank according to claim 1, characterized in that, The lining ring is at least equally divided into four arc segments.

3. The auxiliary positioning device for the long tool shank according to claim 1 or 2, characterized in that, A retaining ring is provided at one end of the lining ring.

4. The auxiliary positioning device for the long tool shank according to claim 1, characterized in that, The tool shank collar is of a split structure, including an upper ring block and a lower ring block, and the upper ring block and the lower ring block are connected by fasteners.

5. The auxiliary positioning device for the long tool shank according to claim 4, characterized in that, The contact surfaces of the upper ring block and the lower ring block are of an engaging type.

6. The auxiliary positioning device for the long tool shank according to claim 1, characterized in that, The inner hole is a circular hole or a square hole.

7. The auxiliary positioning device for the long tool shank according to claim 1, wherein The tool shank collar and the lining ring are in interference fit, or the tool shank collar and the lining ring are connected by a bearing.

8. The auxiliary positioning device for the long tool shank according to claim 1, wherein A plurality of grease grooves are further formed in the inner wall of the outer ring, and the grease grooves communicate with the plurality of ball holes.

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